82118357 has 8 divisors (see below), whose sum is σ = 84108696. Its totient is φ = 80151552.

The previous prime is 82118329. The next prime is 82118363. The reversal of 82118357 is 75381128.

It can be written as a sum of positive squares in 4 ways, for example, as 27447121 + 54671236 = 5239^2 + 7394^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82118357 - 2⁶ = 82118293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82118557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1283 + ... + 12879.

It is an arithmetic number, because the mean of its divisors is an integer number (10513587).

Almost surely, 2^82118357 is an apocalyptic number.

It is an amenable number.

82118357 is a deficient number, since it is larger than the sum of its proper divisors (1990339).

82118357 is a wasteful number, since it uses less digits than its factorization.

82118357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11767.

The product of its digits is 13440, while the sum is 35.

The square root of 82118357 is about 9061.9179537226. The cubic root of 82118357 is about 434.6570723974.

The spelling of 82118357 in words is "eighty-two million, one hundred eighteen thousand, three hundred fifty-seven".